Jason Loewenstein is an American musician and songwriter, best known for his work as a member of the indie rock band Sebadoh. He has contributed to the band's distinctive sound, which blends elements of lo-fi and alternative rock. Loewenstein is also recognized for his solo projects and collaborations with other artists in the indie music scene. In addition to his work with Sebadoh, Loewenstein has been involved in various side projects, including the band The Fiery Furnaces. His musical style often features introspective lyrics and a mix of acoustic and electric instrumentation, showcasing his versatility as an artist.